Inner tube for tires



UNITED STA JOHN B. TIETLE, 0F JEFFERSON, OHIO.

INNER TUBE FOR TIRES.

Application filed March 6,

To all 'whom t may concern.'

Be it known that T, JOHN B. Tirrnn, a citizen of the United States,residing at @lefferson, in the county of Ashtabula and State of Chio,have invented certain new and useful improvements in inner Tubes forTires; and l do hereby declare the following to be a full, clear, andexact description of t ie invention, such as will enable others skilledin the art to which it appertains to malie and use the same, referencebeing had to the accompanying` drawings, and to the letters and figuresof reference marked thereon, which form a part of this speciiication.

'T he object of this invention is to provide `a cushion tire forautomobiles and other vehicles, in which an ordinary outer casing isused, combined with an inner core, preferably of rubber, and providedwith numerous vertically extending` recesses, all as more particularlyhereinafter described.

The invention is clearly illustrated in its preferred form in theaccompanying drawing, in which like reference characters designatecorresponding parts throughout the several views. Briefly described:

Figure l is a transverse sectional. view of an inner core, constructedin accordance with my invention, n

7F ig. 2 is a fragmentary top plan view thereof,

Fig. 3 is a view similar a slight modi-iication, and

Fig. 4 is a fragments the modilication shown.

Referring now in detai t the drawing, and iirst to Figs. l and 2 theVcolt:

l designates an inner core of suitable mate rial, preferably rubber,circular in cross-sec` tion, as sl'iown, and provided with a pluralityof vertically extending recesses, or pockets 2. Preferably, the core lis provided on its inner periphery with a dove-v Fig. l, showing planview of 'D Speceaton of Letters Patent. Patented Jan, 25, 1921 1920.Serial No. 363,661.

tailed liange 3 which seats in a correspondingly shaped recess, orcut-away portion in the ends of the outer casing 4, whereby the innercore l is held against creeping with respect to the outer casing 4. Itwill be noted that the cells 2 extend from the top or tread portion ofthe core, and terminate at points removed from the inner peripherythereof.

The core l may be constructed in one piece or in sections as may bepreferred.

Referring now in detail to Figs. 3 and e:

The modification herein shown consists of reinforcing the air cells 2 bymeans of the textile lining 5, preferably duck or canvas, which ismolded into the inner core l', when the same is being` made. Thefunction of this reinforcement is to strengthen the core l, and toprevent undue spreading thereof due to the weight of the car.

rThe reinforcement of the columns is an important feature of thisinvention especially in that it materially enhances the cushioningelfect, which is accomplished both by its resistance and by its causingthe cellular resistance to increase the pressure at given compression.

What l claim to be new is:

A pneumatic tire core comprising a pliable annulus of substantiallycircular cross section, provided with a plurality of parallelcylindrical cells extending from the periphery inward radial of the anisof the wheel and substantially, but not entirely, 'through the annulus,the cubic capacity of the cells being substantially the whole of thebody structure, except sullicient to give strength to the cells, thewalls of the cells being reinforced by material other than the corematerial.

In testimony whereof hereunto affix my signature.

JOHN B. TITTLE.

